<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.wermuth.de/Kochfelder/22146994_Siemens-ER-926-SB-70-D-Facette-Dual-Wokbrenner-90-cm-Autark.html>